78274516 has 12 divisors (see below), whose sum is σ = 137044180. Its totient is φ = 39119040.

The previous prime is 78274513. The next prime is 78274523. The reversal of 78274516 is 61547287.

It can be written as a sum of positive squares in 2 ways, for example, as 41550916 + 36723600 = 6446^2 + 6060^2 .

It is a super-2 number, since 2×78274516² = 12253799710068512, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78274513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11056 + ... + 16696.

Almost surely, 2^78274516 is an apocalyptic number.

It is an amenable number.

78274516 is a deficient number, since it is larger than the sum of its proper divisors (58769664).

78274516 is a wasteful number, since it uses less digits than its factorization.

78274516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9114 (or 9112 counting only the distinct ones).

The product of its digits is 94080, while the sum is 40.

The square root of 78274516 is about 8847.2886242057. The cubic root of 78274516 is about 427.7665262284.

The spelling of 78274516 in words is "seventy-eight million, two hundred seventy-four thousand, five hundred sixteen".